Yeah, I see what you mean about messaging! Maybe you could set yourself a time limit of like, five minutes(?) and after that you just have to send the message and not edit it anymore?
I can understand your reasons for not wanting to tell your family right now. I hope that at some point it might feel like an option for you,
I'm so pleased that RAINN has been helpful for you and I hope you'll continue to feel able to get in touch with them when you need support.
How are you doing generally?